Contact angles and external protein adsorption onto UF membranes

Palacio, Laura; Calvo, José Ignacio Madalena; Prádanos, Pedro; Hernández, Antonio; Väisänen, Pasi; Nyström, Marianne

doi:10.1016/s0376-7388(98)00203-8

Cited by 107 publications

(38 citation statements)

References 29 publications

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“…The hydrophilicity of the membrane is often measured through contact angle. It is one of the simplest available methods for determining the hydrophobic or hydrophilic nature of chemical groups attached to the outer layer of a surface [20].…”

Section: Wet-ability Measurementsmentioning

confidence: 99%

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Eldin¹

2015

AJAC

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Novel polyvinyl chloride grafted poly (ethylene imine), PVC-g-PEI membranes have been successfully synthesized by solvent evaporation technique using THF/ethanol as a solvent mixture. PEI was incorporated into PVC in different portions to increase the weak hydrophilicity of PVC membranes and to enhance physicochemical membranes surface properties. Membranes preparation conditions of PVC-g-PEI and their applications for water desalination process were optimized and discussed in details. PVC-g-PEI membranes were characterized by FTIR, morphologically using SEM, thermally using TGA&DSC, and mechanically using universal testing machine. Poly (ethylene glycol), PEG was then added to PVC-g-PEI membranes as a pore forming additive to increase pores density area and improve efficiency of the permeation flux of membranes. Addition of PEG portions increased permeation flux of PVC-g-PEI membranes2 ) and salt rejection performance for mono membrane (33.5%, 30.8%and 27.4 %) for 3%, 2% and 1% NaCl solutions, respectively. Ion Exchange Capacity (IEC) for (PVC-g-PEI) membrane was 2.3 meq/gm and water uptake was 23%.All filtration experiments results were carried out at a trans-membrane pressure of 0.3 MPa at room temperature. The results showed that the permeate quality and quantity almost stable upon long run, thus PVC-g-PEI membranes can be used effectively for water treatment applications e.g. Nano-filtration and desalination.

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Section: Wet-ability Measurementsmentioning

confidence: 99%

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Eldin¹

2015

AJAC

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“…The contact angle between the water and membrane surface was directly measured with a contact-angle goniometer [model 100-00-(115/220)-S, Rame-Hart, Netlong, NJ]. 18 To minimized experimental error, the contact angle was measured 10 times for each sample and then averaged. An atomic force microscope (AFM CP, Park Scientific Instruments, Sunnyvale, CA) was used to investigate the surface morphology of the membranes.…”

Section: Membrane Characterizationmentioning

confidence: 99%

Effects of the support‐layer hydrophilicity on the active‐layer formation of composite membranes

Jeon

Yoo

Kim

2007

J of Applied Polymer Sci

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To understand the effects of the hydrophilicity of the support layer on the formation of the active layer and the performance of composite membranes, a support layer was prepared from a polysulfone (PSf) blend with a hydrophilic copolymer, and then its top surface was overcoated with an active layer fabricated by an interfacial reaction of m-phenylenediamine (MPDA) with trimesoyl chloride. The time required for impregnating the support layer with an aqueous solution containing MPDA was gradually decreased by increases in the hydrophilicity of the support layer. The required soaking time was greater than 9 min for the formation of the defect-free active layer when the support layer prepared from PSf was used, whereas it could be reduced about 1 min by the use of the hydrophilic support layer. Furthermore, composite membranes prepared with the PSf/hydrophilic copolymer blend as the support layer always exhibited higher salt rejection and water permeability than those prepared with PSf as the support layer.

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“…To prevent fouling in aqueous media, a membrane surface requires a chemistry that prefers binding to water over other materials. This implies that the membrane surface used for water treatment must be hydrophilic 9,11,14, 18 . One way to evaluate the relative hydrophobicity of the membrane is to measure the contact angle between the membrane surface, air and water.…”

Section: Introductionmentioning

confidence: 99%

“…The above factors imply that if the difference between the advancing and receding angle approaches a value of zero, the substrate is chemically and physically uniform. The details of the Wilhelmy plate method currently being studied are the infl uence of the penetration velocity, contact angle hysteresis infl uence, and adequate data acquisition [18][19] . The dynamic measurement of the contact angle is an important and useful technique in characterizing adsorption and deposition behavior of membranes in contact with protein and other organic solutions 19 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of fouling potential of nanofiltration membranes based on the dynamic contact angle measurements

Gryta

Bastrzyk

Lech

2012

Polish Journal of Chemical Technology

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In this work the studies were performed on the intensity of fouling of the membrane NF90 and NF270 depending on the value of dynamic contact angle, previously determined for these membrane. The NF membranes were used for the separation of broth obtained during the fermentation of glycerol by Lactobacillus casei bacteria. The measurements of dynamic contact angle were carried out using the Wilhelmy plate method. Taped membranes samples (support layer to support layer), wetted for 2 days in deionized water prior to testing, were used to study the contact angle of top layer and its organic fouling. Using deionized water; the contact angle values equal to [27][28][29][30] o and 53-57 o for NF270 and NF90, respectively, were obtained. As a consequence of adsorption of organic compound on the membrane surfaces, the contact angle obtained for both fouled membranes was about 55-56 o , and this value was closer to the contact angle of non-fouled NF90 membrane. Therefore, the NF90 membrane was more resistant to organic fouling during the separation of broth.

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Contact angles and external protein adsorption onto UF membranes

Cited by 107 publications

References 29 publications

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Effects of the support‐layer hydrophilicity on the active‐layer formation of composite membranes

Evaluation of fouling potential of nanofiltration membranes based on the dynamic contact angle measurements

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